Texas Instruments TPS61098DSET

Overview

TPS61098DSET from Texas Instruments is an ultra-low quiescent current synchronous boost converter with integrated LDO, designed for single-cell battery-powered systems. It delivers 4.3 V main output and 3.1 V LDO output in Active mode, starts up at 0.7 V input, supports automatic pass-through, and consumes only 300 nA in Low Power mode - enabling multi-year operation in BLE tags and wearable sensors.

For engineers reviewing the TPS61098DSET datasheet, TPS61098DSET pinout, TPS61098DSET application, or TPS61098DSET equivalent, this page provides verified technical context, validated pin functions, confirmed dual-rail operating modes (Active/Low Power), exact WSON-6 package dimensions, and two rigorously cross-referenced alternative parts for low-power energy harvesting and coin-cell designs.

Technical Context

The TPS61098DSET integrates a hysteretic synchronous boost controller with an LDO output stage, enabling dual-rail power delivery from 0.7–4.5 V input. Its MODE pin selects between Active mode (both outputs enabled, 4.3 V/3.1 V) and Low Power mode (LDO disabled, boost remains active at 2.2 V). The device uses automatic pass-through when VIN exceeds 4.4 V (Active) or 2.25 V (Low Power), bypassing switching to maximize efficiency.

It features a 350–650 mA peak switch current limit, 300-nA quiescent current into VMAIN in Low Power mode (TJ = 25°C), and achieves up to 88% efficiency at 10 µA load (2 V → 3.3 V conversion). The LDO maintains 60–100 mV dropout at 50 mA and provides 40 dB PSRR at 1 kHz.

Key Specifications

Pinout & Package

TPS61098DSET is housed in a 1.5 mm × 1.5 mm, 6-pin WSON package with wettable flanks and thermal pad exposed on bottom. Package code DSE denotes tape-and-reel packaging (250 units/reel with T suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar boost-with-LDO applications.

Compared with TPS610987DSET and TPS610981DSET, the TPS61098DSET offers the highest main rail voltage (4.3 V) and lowest quiescent current in Low Power mode without VSUB discharge - making it optimal for long-life, high-voltage, static-peripheral applications like remote controls and sealed sensors.

Availability

TPS61098DSET is available at Aetrix Electronics and suitable for smart remote control, BLE tag, and wearable health sensor applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS61098DSET includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with over 50 years of innovation in energy-efficient power conversion.

The TPS61098x family was engineered specifically for ultra-low-power, battery-constrained applications - delivering nanoscale quiescent current, sub-1-V start-up, and integrated dual-rail regulation in minimal footprint for wearables, IoT edge nodes, and portable medical devices.

FAQ

What is the minimum input voltage required for TPS61098DSET to start up?

The TPS61098DSET starts up at 0.7 V input voltage under load (RLoad ≥ 3 kΩ), enabling operation directly from deeply discharged coin cells or single alkaline batteries. This is confirmed in Section 7.5 of the datasheet under VIN(start) parameter, with no external bias or auxiliary circuitry required.

How does the MODE pin control operation in TPS61098DSET?

The MODE pin on the TPS61098DSET is a digital input: logic high (≥1.2 V) enables Active mode (both VMAIN and VSUB outputs active at 4.3 V and 3.1 V), while logic low (≤0.4 V) enables Low Power mode (VMAIN at 2.2 V, VSUB disabled). The pin must be actively driven - floating is prohibited per Table 6-1.

Does TPS61098DSET include an active discharge path for the VSUB rail?

No, the TPS61098DSET does not provide active discharge for the VSUB rail in Low Power mode. This feature is present in TPS610981DSET and TPS610987DSET (5–8 mA sink), but absent in TPS61098DSET per Device Comparison Table row "VSUB ACTIVE DISCHARGE IN LOW POWER MODE" showing "No".

What is the pass-through threshold voltage for TPS61098DSET in Active mode?

In Active mode, the TPS61098DSET enters pass-through when VIN rises above 4.4 V (with 0.1 V hysteresis), connecting VIN directly to VMAIN and disabling switching to improve efficiency. This value is specified in Section 7.5 under V(PSTH) parameter for TPS61098/7 versions.

What package type and dimensions does TPS61098DSET use?

The TPS61098DSET uses a 6-pin WSON package (package code DSE) measuring 1.5 mm × 1.5 mm nominal body size with wettable flanks. It is supplied in tape-and-reel format with 250 units per reel (T suffix), as documented in the Mechanical, Packaging, and Orderable Information section.